Hand operated staple gun tackers



Jan. 18, 1966 M. ABRAMS HAND OPERATED STAPLE GUN TACKERS 5 Sheets-Sheet1 Filed Jan. 3, 1964 INVENTOR. MORZ/5 AER/1M5 ATTORNEYS.

Jan. 18, 1966 M. ABRAMS 3,229,882

HAND OPERATED STAPLE GUN TACKERS Filed Jan. 5, 1964 5 Sheets-Sheet 2 vll 95 127 624 INVENTOR. MORE/5 AEFAMfi Z ZQMMXM A T/WR/VEYE.

Jan. 18, 1966 M. ABRAMS HAND OPERATED STAPLE GUN TAGKERS 5 Sheets-Sheet5 Filed Jan. 5, 1964 INVENTOR. MMfi/f 14864015 'FIQH United StatesPatent 3,229,882 HAND OPERATED STAPLE GUN TACKERS Morris Abrams, GreatNeck, N.Y., assignor to Arrow Fastener Co., Inc., Brooklyn, N.Y., acorporation of New York Filed Jan. 3, 1964, Ser. No. 335,526 8 Claims.(Cl. 227132) This invention relates to hand operated staple gun tackers.

An object of this invention is to provide a stapling machine of thecharacter described formed with an arcuate slot through which extends apin assembling various parts of the machine housing and acting to stopupward swinging motion of a handle pivoted to the housing prior todepressing the handle to drive a staple. The housing, in accordance withthe present invention, includes a member made of plastic formed with astop bump or lug to stop the downward depressing movement of the handlefor raising the plunger and loading a drive spring, when the plunger hasbeen raised to a position where the spring is fully loaded and theplunger released for a staple driving operation, said pin also servingto stop depressing movement of the handle, should said stop lug bebroken or worn or otherwise fail to stop depression of said handle.

Another object of this invention is to provide in a stapling device ofthe character described, a latch for releasably raising the plungerslidably and substantially nonpivotally mounted on the actuating handleby means of a pair of pin and slot connections, one of which comprises apin on the housing, and on which the handle is pivoted, and said latchbeing connected to the handle by spring means which biases the latchtoward engagement with the plunger, the construction being such thatafter the handle is depressed and the plunger is raised and released fora drive operation by a loaded spring, said handle may be released, toalso lower the latch and said latch will be pushed back against thetension of the spring which connects the latch with the handle to permitthe latch to be snapped beneath a shoulder on the plunger, so as to beready to again raise the plunger the next time the handle is depressed.

Yet another object of this invention is to provide in a stapling deviceof the character described, a housing comprising a pair of steel sideplates on opposite sides of a plastic piece sandwiched therebetween andassembled therewith by transverse pins, and said plastic piece having ameans whereby said plastic piece aids in preventing said side platesfrom becoming offset one from the other.

Still another object of this invention is to provide in a staplingmachine of the character described, a common means to space the sideplates of the housing and act as an abutment for the upper end of theplunger driving spring.

A further object of this invention is to provide in a stapling device ofthe character described an improved plunger comprising a plunger bladehaving wings slidable in slots in the housing and attached to a plungerblade holder by a pair of rivets, said blade having a hole between therivets and said holder having an outwardly pressed portion projectinginto said opening whereby to facilitate accurate assembly of the bladeand holder.

A still further object of this invention is to provide in a staplingdevice of the character described, a housing having a hand hole soarranged that the upper side of the staple magazine is exposed, and saidupper side of the staple magazine having a top longitudinal slot solocated that one can see how much of the staple strip is left in themagazine and also to facilitate cleaning the magazine.

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Yet a further object of this invention is to provide a staple device ofthe character described provided with improved releasable clip means tohold the staple pusher inplace.

A still further object of this invention is to provide in a stapler ofthe character described a housing having an operating handle pivotedthereto, a stop on the housing and a bail pivoted to the housing andengageable with the handle to hold it on the stop, in the down ordepressed position of the handle to compact the stapler for shipment andto hold the handle against movement; improved means for causing the bailto snap into an unused position against the housing when pushed towardsuch position to ensure against the bail projecting out from the housingwhen the stapler is being operated.

Still a further object of this invention is to provide a strong anddurable stapling device of the character described which shall berelatively inexpensive to manufacture, easy to manipulate, easy toassemble, positive in action and practical and eflicient to a highdegree in use.-

Other objects of this invention will in part be obvious and in parthereinafter pointed out.

The invention accordingly consists in the features of construction,combinations of elements and arrangement of parts, which will beexemplified in the construction hereinafter described, and of which thescope of invention will be indicated in the following claims.

In the accompanying drawings in which is shown an illustrativeembodiment of the invention,

FIG. 1 is a side elevational view of a staple gun embodying theinvention and showing the handle held down by the bail;

FIG. 2 is a vertical longitudinal cross sectional view of the staplerdevice, with the handle released and in upmost position and with thebail in snapped down position;

FIG. 3 is a cross-sectional view taken on line 3-3 of FIG. 2;

FIG. 4 is a cross-sectional view taken on line 44 of FIG. 2;

FIG. 5 is a cross-sectional view taken on line 55 of FIG. 2;

FIG. 6 is a cross-sectional view taken on line 66 of FIG. 3;

FIG. 7 is a cross-sectional view taken on line 77 of FIG. 2;

FIG. 8 is a cross-sectional view taken on line 88 of FIG. 2;

FIG. 9 is a partial cross-sectional view similar to FIG. 2, but showingthe handle depressed to a point where the plunger is raised but not yetreleased;

FIG. 10 is a view similar to FIG. 9, but showing the plunger releasedand moved down by the spring, but with the handle still in depressedcondition;

FIG. 11 is a partial vertical view of the lower rear corner of thestapler, with parts broken away and in cross-section and illustratingthe clip for the staple strip pusher pressed-in prior to removal; and

FIG. 12 is a view similar to FIG. 11 but showing the clip pushed downand beginning to come out.

Referring now in detail to the drawing, 10 designates a hand operatedstaple tacker embodying the invention. The same comprises a housing 11provided with a pair of similar symmetrically disposed metal side platemembers 12. Each side plate member 12 has a fiat vertical wall portion13 provided with a hand hole 14, and having a lower straight horizontaledge 15 from the rear end relation. Said fingers 18 have upper edges 20,and are formed with registering notches 21 forming a slot 22 below saidedges 20 for the purpose hereinafter appearing. The lower edges 20a offingers 18 have registering inner corner notches 23 forming a groove orslot 24.

Each flat wall portion 13 is also formed with an upwardly and forwardlyinclined edge 25 extending from said portion 17 thereof, merging into atop horizontal edge 26 extending forwardly to an upwardly and forwardlycurved edge 27. V

The hand hole 14 in flat wall portion 13, forms a lower horizontal edge28 from the ends of which extend upwardly, front and rear edges 29, 30merging with an upper horizontal edge 31. The four corners of the handhole are curved as shown in the drawing.

At the front end of each fiat wall portion 13 is an outwardly extendingshoulder 32 from which extends forwardly, a flat vertical front end wallportion 33. Wall portion 33 has a pair of rearwardly extending ears 34,35. Flat wall portion 33 has a front vertical edge 36 formed with arearwardly recessed vertical groove 37 in the upper portion thereof, forthe purpose hereinafter appearing.

Extending inwardly from the upper ends of fiat portions 33 are tophorizontal flanges 39 having inner substantially abutting edges 40formed with registering notches forming a hole 41.

Each fiat wall portion 13 is formed with a hole 45 just forwardly of thelower edge of portion 17; with a hole 46 above the hand hole 14 andrearwardly thereof, and with a hole 47 above the hand hole andrearwardly of the front end thereof.

Said flat wall portion 13 is also formed with a small hole 49 disposedabove hole 46. It is also formed with a hole 50 rearwardly of shoulder32 and below car 35.

Ears 34, 35 are formed with holes 51, 52 respectively.

Flat wall portion 33 is also formed, near the upper end thereof, with ahorizontal slot 53 and further down with a slot 54 having an upperportion 55 and a lower portion 56.

Said flat wall portion 33 also has a lower horizontal edge 58 at thelevel of lower edge 15 of fiat wall portion 13.

Interposed between the side plate members 12 is a member 60, preferablymade of molded plastic. Member 60 may be made of a pair of hollow ribbedand pinned together halves 61, 62 having mutually contacting surfaces 63at a vertical longitudinal central plane. Of course, if desired, member60 may be made as a single piece and of any desired suitable material.

Member 60 comprises a portion 60a disposed between the portions of platemembers 12 which lie above the hand hole 14, and it has a forwardly anddownwardly curved front end 60b at the upper end of edges 29, and a reardownwardly extending portion 600 at the upper end of edge 30 and betweenthe plate members 12. Said member 60 projects beyond edges 29, 31, 30having outwardly extending beads 60d overlapping said edges. Said member60 also has an outer bead 60:? extending beyond the inner edges of platemembers 12, at the top and partially around the rear thereof. Saidmember 60 also has an upwardly extending lug 62 near its rear end forthe purpose hereinafter appearing. Plates 12 are formed with inwardlyextending lips or beads 12b at their outer edges, disposed below beads60d, and received in correspondingly formed grooves in members 61 and62.

Plate members 12 are attached to member 60 by a pair of cross rivets 63,64 passing through openings 46, 47 respectively, on the plate members,and through registering openings in member 60.

Member 60 together with the strap portions 12a of plate members 12 abovethe hand hole constitute a handle for the device. The upper edges 20 offingers 18 engage lower edges 60 of the rear portion of member 60. Thus,

member 60 aids in preventing the plate members 12 from being offset onewith respect to the other.

Plate members 12 are also interconnected by a cross bolt 65 passingthrough openings 45. A transverse rivet 66 passes through openings 50 inplate members 12 to interconnect the latter.

Fitted over the front end of the plate members 12 is a nose piece 70.The same comprises a front wall 71 from which extends rearwardly sidewalls 72 contacting the outer surfaces of fiat portions 33 of the platemembers 12. The front vertical edges 36 of side wall portions 33 contactthe inner surface of front wall 71 of nose piece 70. Front wall 71 has aforwardly recessed vertical cen-. tral portion 74 for the purposehereinafter appearing. Said side walls 72 have lower edges 75 at levelof edges 58 of side plates 12. Said side walls 72 have rearwardlyextending lower cars 76 overlapping ears 34 and upper ears 77overlapping ears 35. Bars 76, 77 have holes registering with holes 51,52 respectively, of plate members 12 and receiving cross bolts 76a, 77a.Spacer sleeves 76b, 77b may be carried by said bolts.

The top flanges 39 of plate members 12 are disposed at a somewhat higherlevel than the upper edges of front wall 71 and side walls 72 of thenose piece. Side walls 72 of the nose piece are cut around the undersideof slot 54 in fiat portions 33 of side plate members 12. Front wall 71of the nose piece is formed with a pair of vertical slots 80 for thepurpose hereinafter appearing.

A lower transverse horizontal stop member 81 111218 wings 81a projectinginto slot portions 56. A cushioning plate 82 on said stop plate haswings 83 projecting into slot portions 55. A second cushion plate 84 maybe mounted on cushion plate 82. On the stop 81, and cushions 82, 84 is aplunger 85 comprising a plunger holder 86 to which is fixed a plungerblade 87.

The plunger holder 86 is cup shaped and comprises a bottom wall 86a, afront wall 86b, side walls 861': and a rear wall 86d. Side walls 860 areformed with rearwardly extending hooks 88 having lower upwardly andrearwardly inclined edges 88a and upper reawardly and downwardly curvededges 88b. The front wall 86b of the plunger holder 86 is formed with acentral, outwardly recessed circular lug 89 and with rivet holes 90, 91above and belowv said lug. Fixed to the front side of front wall 86b isthe plunger blade 87. Said blade 87 has at its upper end, wings 87areceived in grooves 37 at the front ends of plate members 12. Plungerblade 87 is slidably mounted to move up and down with the plunger holder86, and contacts the inner surface of front wall 71 of nose piece 70.Rivets 90a, 91a serve to fix the plunger blade 87 to the plunger holder86. The front heads 90b, 91b of the rivets project into the groove 74aformed by the forwardly recessed portion 74 of the front wall of thenose piece. When the plunger holder 86 is resting on the bottom stops,the lower edge of the plunger blade 87 is at the lower end of front wall71 of the nose piece and between the slots 80.

A top horizontal cross stop plate 92 has side Wings 92a projecting intoslots 53 in portions 33 of side plates 12.

A central guide pin 92b riveted to stop plate 92 projects downwardlytherefrom. The opening 40 is located directly above the guide pin 92b. Acoil compressionv spring 95 is interposed between the plunger holder 86and the stop plate 92. The lower end of the spring presses down on thebottom of the plunger holder 86. The guide pin 92b projects into theupper end of the spring.

In the lower end of the machine 10 is a staple magazine 100. Saidmagazine may comprise a magazine body 101 having a bottom wall 102, theundersurface of which is at the level of edges 15. Extending upwardlyfrom bottom wall 102 are vertical side walls 103 spaced inwardly of sideplates 12 and having inwardly extending horizontal top flanges 104forming a longitudinal slot therebetween. Side walls 103 have lugs 103aat their front ends projecting into slots 80. Said side walls also haverear upstanding ears 103]) formed with holes through which bolt 65passes.

Fixed to the inside surface of bottom wall 102 is a staple guide channel105 having a bottom wall 106 and upstanding side walls 107 spacedinwardly from side walls 103 and having upper edges 108 on which thestaple strip slides with the legs of the staples between side walls 103and 107.

The front edges of side walls 107 are spaced from front wall 71 of thenose piece 70 by the thickness of the plunger blade so that when theblade descends, it will drive the foremost staple in the staple strip.

The flanges 104 are above the lower edges 28 at the hand hole, so thatthe top of the staple magazine is exposed whereby the operator can seethrough the slot between flanges 104 to determine how much of the staplestrip is left, and to facilitate cleaning of the staple magazine.

A staple strip pusher 110 for pushing a staple strip 111 in themagazine, comprises a rod 112 extending longitudinally with the channel.On the channel 105 is slidably mounted a slider 113 adapted to engagethe rear end of the staple strip. Said slider 113 has depending ears 114having holes through which the rod 112 passes. A coil tension spring 115on the rod 112 presses against the rear ear. Fixed to the rear end ofrod 112 is a vertical back plate 116 having forwardly extending sideflanges 117 straddling the side plate members 12 at their rear ends.Plate 116 has an upwardly extending hook 118 extending around theportions of fingers 18 between slot 22 and groove 24. The coil springpresses against the inner surface of back plate 116 and normally keepssaid plate spaced from the rear edges 16 of plates 12. Thus spring 115also biases the slider 113 forwardly against the staple strip. Saidspring also keeps plate 116 in the plane of fingers 18, with the hook118 engaged with the fingers 18.

The plate 116 may be pushed forwardly to disengage the hook 118. Saidplate may then be pressed down to clear fingers 18 and then pulledforward to pull out the pusher 110.

Improved means is provided to actuate the plunger 85. To this end, thereis rotatably mounted on pin 66, an actuating member 120. Said member 120comprises side walls 121 interconnected by a top wall 122. The forwardend of member 120 is located between the side plate members 12, and theside walls 121 are formed with suitable bearing openings 123 registeringwith openings 50 in side plates 12, and through which pin 66 passes.Said side walls 121 are also formed with arcuate slots 125 through whichpin or bolt 77a and sleeve 77b pass. The actuating member 120 comprisesa rearwardly extending handle 127 forming an extension of top wall 122and side flanges 121. On the sleeve 77b is a coil torsion spring 130having one radial end 131 engaging beneath handle 127. The oppositeradial end 132 of spring 130 engages in a longitudinal slot or groove133 formed in member 60 at its upper side, between portion 600 and lug62 and at the split 63. The bottom of groove 133 is inclined upwardlyand rearwardly as shown in FIG. 2. When the handle is up (under theinfluence of spring 130) sleeve 77b is at the upper rear end of slot 125(the centerline of the curvature of the slots is at the axis of pin77a). The pin 77a and its sleeve 77b thus act as a stop for the upwardor released position of the actuating member 120. When the handle 127 ispressed down its underside will strike the top of bump or lug 62 to stoprotation of member 120 before sleeve 77x is at the lower front end ofthe slots 125. However, if the top end of lug 62 should wear away orbreak, downward movement of the handle will be stopped by said pin 77aand its sleeve 77b bottoming at the lower front end of the slots 125.

Extending forwardly from the top wall 122 is a downwardly and forwardlycurved tongue 135 which moves under top flanges 39 when the handle 1.27is raised, and covers the space between the top wall and said flangeswhen the handle is raised, so that nothing can get caught in such space.

The side flanges 121 of the actuating member have lower edges 136 whichare inclined upwardly and forwardly when the handle is fully depressed.The lower end portions 137 of said flanges 121 are preferably oifsetinwardly from the upper portions of said flanges as shown in FIG. 4.Said portions 137 carry a cross pin 138 having outer ends projectingbeyond said portions. Pin 138 is located near the front end of portions137.

Straddling the underside of said portions 137 is a latch 140 having abottom web 141 from which extend upwardly, parallel flanges 142 disposedat the outer sides of said portions. Flanges 142 are formed with frontslots 143 parallel to web 141, receiving the outward extensions of pin138. Said flanges 142 are also formed with rear slots 144 also parallelto web 141 and through which passes the pin or bolt 66. Thus, the latch140 is slidable on the actuating member 120. A coil tension spring 145interconnects pin 138 with the rear end of web 141 and tends to projectthe latch 140 forwardly. Said latch has at its front end, a pair offingers 147, oflset outwardly from flanges 142 and adapted to engageedges 88a of hooks 88 when the handle is depressed. When the handle isup, and the plunger 85 is up, fingers 147 are disposed below hooks 88,as shown in FIG. 2 of the drawing.

However, as the handle is depressed, fingers 147 will engage beneathhooks 88 and raise the plunger to compress spring 95 and hence load theplunger, as the plunger blade is pulled up sufliciently to clear thestaple strip and allow the foremost staple to be moved by the pusheragainst the front wall of the nose piece.

Just before the handle 127 contacts bump 62, the fingers 147 clear ormove past hooks 88 and the loaded spring quickly moves the plunger downfor a stapling operation. When the handle is then released, the curvedor cammed underedges 14711 of fingers 147 contact cammed or curved edges88b of hooks 88 and said latch 140 is moved backwards, tensioning spring145. When the fingers 147 are beneath the hooks 88, said tensionedspring will project said latch forwardly.

Means is provided to hold the handle down when the stapler is not inuse. To this end, halves 61, 62 are formed with horizontally alignedholes 61a, 62a located somewhat at a higher level than openings 49 inplates 12, and directly above such openings. A bail 150 of metal wire,comprises a transverse intermediate portion 151 from which extend sidearms 152 formed with inwardly extending inclined pintles or fingers 153extending through openings 49 and 61a, 62a. When the handle 127 is upand the bail 150 is swung down and back, in the position of FIGS. 2 and5, the fingers 153 are inclined upwardly and inwardly, their outerlowered ends being located in the lower openings 49 in plate members 12,and their inner higher ends being located in the higher openings 61a,62a. The bail 150 may be swung up to engage with the outer end of thehandle to hold it down and retain the actuating member 120 ininoperative position, as shown in FIG. 1 with the handle 127 somewhatabove lug or bump 62. When it is desired to release the actuating memberfor operation, the handle is pushed all the way down to contact lug orbump 62, and the bail is swung back and down. As the bail passes belowthe horizontal position thereof, it will snap down so that portion 151thereof contacts fingers 18. This snap down action is caused by the factthat the openings 61a, 62a are above the openings 49 and the fingers 153being inclined are under tension and tend to move to an intermediatecondition. Hence the bail moves to the down position where the fingersare not under tension.

It will thus be seen that there is provided an apparatus in which theseveral objects of this invention are achieved and which is well adaptedto meet the conditions of practical use.

As possible embodiments might be made of the above invention, and asvarious changes might be made in the embodiment above set forth, it isto be understood that all matter herein set forth or shown in theaccompanying drawing is to be interpreted as illustrative and not in alimiting sense.

I claim:

1. In a stapling device, a housing comprising a pair of opposed sideplates formed with hand holes, a member interposed between said plates,above said hand holes, means interconnecting said plates to attach saidside plates and member together, said member comprising a pair ofsimilar hollow halves symmetrical about a central longitudinal verticalplane between said plates, said halves being formed with outwardlyextending bead portions overlying the adjacent edges of said plates,said plates being formed with inwardly extending lips, and said halvesbeing formed with grooves inwardly of said beads, to receive said lips,a nose piece at the front end of the housing and having a front wall andside flanges straddling said plates, means to attach said nose piece tosaid plates, an actuating member projecting into said housing and beingpivoted to said plates, said actuating member having a handle and stopmeans on said first mentioned member to limit downward movement of saidhandle, a plunger in said nose piece and means on the actuating memberto move said plunger.

2. In a stapling device, a housing comprising a pair of opposed sideplates formed with hand holes, a member interposed between said plates,above said hand holes, means to attach said side plates and membertogether, a nose piece at the front end of the housing and having afront wall and side flanges straddling said plates, means to attach saidnose piece to said plates, an actuating member projecting into saidhousing and being pivoted to said plates, said actuating member having ahandle and stop means on said first mentioned member to limit downwardmovement of said handle, a plunger in said nose piece and means on theactuating member to move said plunger, said plates having fingers attheir rear ends, extending inwardly toward each other and said firstmentioned member having shoulder means engaging said fingers to aid inpreventing offsetting of said plates relative to one another.

3. In a stapling device, a housing comprising a pair of opposed sideplates formed with hand holes, a member interposed between said plates,above said hand holes, means to attach said side plates and membertogether, a nose piece at the front end of the housing and having afront wall and side flanges straddling said plates, means to attach saidnose piece to said plates, an actuating member projecting into saidhousing and being pivoted to said plates, said actuating member having ahandle and stop means on said first mentioned member to limit downwardmovement of said handle, a plunger in said nose piece and means ontheactuating member to move said plunger, and a bail having meansengaging openings in said plates and interposed member and hence beingpivoted to said plates and interposed member, and said bail having meansto engage said handle to keep the handle on said stop, means associatedwith said plates, interposed member and bail to bias the bail member torotate in a direction to snap the bail down against said housing to theinoperative position of said bail, and said bail having inwardlyextending pintles, inclined upwardly when the bail is in swung down,inoperative position, and said openings in said interposed memberreceiving said pintles and being disposed at a level somewhat higherthan the openings in said plates.

4. In a stapler machine, a housing comprising side plates having frontedges formed with vertical grooves, a nose piece attached to the housingand having a front wall contacting said front edges, a plunger cup inthe housing, a plunger blade having wings slidably received in saidgrooves, said blade being riveted to said plunger cup by a pair ofvertically spaced rivets, said blade having an opening between saidrivets and said cup having an outwardly recessed portion received insaid opening.

5. In a stapling machine, a pair of metal side plates formed with handholes, a member made of plastic interposed between said side plates andabove said hand holes, transverse pins passing through aligned holes insaid plates and member to attach said plates to opposite sides of saidmember, and said side plates having integral portions extending inwardlyof said side plates, and said interposed member having transverseshoulder means engaging said inwardly extending portions to aid inpreventing said side plates from becoming offset one from the other.

6. The combination of claim 5, said interposed member having portionsextending beyond edges of portions of said side plates between which thesaid member is interposed.

7. The combination of claim 6, said interposed member having beadportions overlying said edges.

8. In a stapling device, a housing comprising a pair of opposed sideplates formed with hand holes, a member interposed between said plates,above said hand holes, means interconnecting said plates to attach saidside plates and member together, said member comprising a pair ofsimilar hollow halves symmetrical about a central longitudinal verticalplane between said plates, said halves being formed with outwardlyextending bead portions overlying the adjacent edges of said plates, anose piece at the front end of the housing and having a front wall andside flanges straddling said plates, means to attach said nose piece tosaid plates, an actuating member, projecting into said housing and beingpivoted to said plates, said actuating member having a handle and stopmeans on said first mentioned member to limit downward movement of saidhandle, a plunger in said nose piece and means on the actuating memberto move said plunger, said side plates having at their rear ends,fingers extending inwardly toward each other and formed with a slot, astaple pusher in said magazine having a hook portion engaging portionsof said fingers and projecting into said slot.

' References Cited by the Examiner UNITED STATES PATENTS 2,109,2032/1938 Spencer 1422 2,207,377 7/ 1940 Hansen 1-422 2,548,736 4/ 1951Morberg 1-422 2,671,215 3/1954 Abrams 1-422 2,884,636 5/1959 Abrams 14222,923,938 -2/ 1960 Rinehardt 1-422 2,982,966 5/1961 La Pointe et a11-422 3,034,128 5/1962 Robbins 1-422 GRANVILLE Y. CUSTER, 1a., PrimaryExaminer.

1. IN A STAPLING DEVICE, A HOUSING COMPRISING A PAIR OF OPPOSED SIDEPLATES FORMED WITH HAND HOLES, A MEMBER INTERPOSED BETWEEN SAID PLATES,ABOVE SAID HAND HOLE, MEANS INTERCONNECTING SAID PLATES TO ATTACH SAIDSIDE PLATES AND MEMBER TOGETHER, SAID MEMBERS COMPRISING A PAIR OFSIMLAR HOLLOW HALVES SYMMETRICAL ABOUT A CENTRAL LONGITUDINAL VERTICALPLANE BETWEEN SAID PLATES, SAID HALVES BEING FORMED WITH OUTWARDLYEXTENDING BEAD PORTIONS OVERLYING THE ADJACENT EDGES OF SAID PLATES,SAID PLATES BEING FORMED WITH INWARDLY EXTENDING LIPS, AND SAID HALVESBEING FORMED WITH GROOVES INWARDLY OF SAID BEADS, TO RECEIVE SAID LIPS,A NOSE PIECE AT THE FRONT END OF THE HOUSING AND HAVING A FRONT WALL ANDSIDE FLANGES STRADDLING SAID PLATES, MEANS TO ATTACH SAID NOSE PIECE TOSAID PLATES, AN ACTUATING MEMBER PROJECTING INTO SAID HOUSING AND BEINGPIVOTED TO SAID PLATES, SAID ACTUATING MEMBER HAVING A HANDLE AND STOPMEANS ON SAID FIRST MENTIONED MEMBER TO LIMIT DOWNWARD MOVEMENT OF SAIDHANDLE, A PLUNGER IN SAID NOSE PIECE AND MEANS ON THE ACTUATING MEMBERTO MOVE SAID PLUNGER.